The Effect of Molar Mass on the Vapor Pressure of Sucrose, Glucose, and Sodium Chloride Fluids
Audio Recording:
Common Abstract:
THE EFFECT OF MOLAR MASS ON THE VAPOR PRESSURE OF FLUIDS. Ben Palmer & Nel Siemsen. This lab examines the effect of three solutes of different size and molar mass, being glucose, sucrose, and sodium chloride, on the colligative property of vapor pressure against a control of water. These three solutes were chosen because of their varying sizes. Before the experiment, the needed amounts of NaCl, C12H22O11, and C6H12O6 by determining a molarity within the solubility limits of all three solutes (2.0 M was chosen). The settling caused by the vapor pressure in the tubes, when elevated high enough to counteract atmospheric pressure, caused the solutions to pull a vacuum at the top of the tubes. To achieve this height the tubes were elevated five stories in the air. With the exception of the sucrose solution in the first trial, and the sucrose and sodium chloride solutions in the second trial, the experiment showed that the higher the molar mass, the lower the vapor pressure. Keywords: vapor pressure, molar mass, molarity, kPa, atmospheric pressure.
Tucker, E. E., & Christain, S. D. (1984).Solubilization of benzene by aqueous sodium octylsulfate: effect of added sodium chloride. Department of Chemistry, University of Oklahoma.
Audio Recording:
Common Abstract:
Keywords: vapor pressure, molar mass, molarity, kPa, atmospheric pressure.
Lab Apparatus & Solutions:
Graphs:
Trial 1:
Temperature and Pressure monitors:
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Trial 2:
Temperature and Pressure monitors:
Pressure data:
Citations:
Tucker, E. E., & Christain, S. D. (1984).Solubilization of benzene by aqueous sodium octylsulfate:
effect of added sodium chloride. Department of Chemistry, University of Oklahoma.
Martinez, I. (n.d.). Mixture settling. Retrieved from http://webserver.dmt.upm.es/~isidoro/bk3/c07/Mixture%20settling.htm